Docker readme cleanups (#2483)

* Don't manually pull the base image

* Remove sudo before each docker

cause the user is usually added to the docker group

If not you can read it up here:
https://docs.docker.com/install/linux/linux-postinstall/

* Simplify cd

Docker/README.md

@@ -17,7 +17,7 @@ sh get-docker.sh
 
 ## Create an isolated network
 ```sh
-sudo docker network create freshrss-network
+docker network create freshrss-network
 ```
 
 ## Recommended: use [Træfik](https://traefik.io/) reverse proxy
@@ -25,11 +25,11 @@ It is a good idea to use a reverse proxy on your host server, providing HTTPS.
 Here is the recommended configuration using automatic [Let’s Encrypt](https://letsencrypt.org/) HTTPS certificates and with a redirection from HTTP to HTTPS. See further below for alternatives.
 
 ```sh
-sudo docker volume create traefik-letsencrypt
-sudo docker volume create traefik-tmp
+docker volume create traefik-letsencrypt
+docker volume create traefik-tmp
 
 # Just change your e-mail address in the command below:
-sudo docker run -d --restart unless-stopped --log-opt max-size=10m \
+docker run -d --restart unless-stopped --log-opt max-size=10m \
   -v traefik-letsencrypt:/etc/traefik/acme \
   -v traefik-tmp:/tmp \
   -v /var/run/docker.sock:/var/run/docker.sock:ro \
@@ -55,10 +55,10 @@ You must first chose a domain (DNS) or sub-domain, e.g. `freshrss.example.net`.
 > **N.B.:** Default images are for x64 (Intel, AMD) platforms. For ARM (e.g. Raspberry Pi), use the `*-arm` tags. For other platforms, see the section *Build Docker image* further below.
 
 ```sh
-sudo docker volume create freshrss-data
+docker volume create freshrss-data
 
 # Remember to replace freshrss.example.net by your server address in the command below:
-sudo docker run -d --restart unless-stopped --log-opt max-size=10m \
+docker run -d --restart unless-stopped --log-opt max-size=10m \
   -v freshrss-data:/var/www/FreshRSS/data \
   -e 'CRON_MIN=4,34' \
   -e TZ=Europe/Paris \
@@ -82,11 +82,11 @@ This already works with a built-in **SQLite** database (easiest), but more power
 ### [MySQL](https://hub.docker.com/_/mysql/)
 ```sh
 # If you already have a MySQL instance running, just attach it to the FreshRSS network:
-sudo docker network connect freshrss-network mysql
+docker network connect freshrss-network mysql
 
 # Otherwise, start a new MySQL instance, remembering to change the passwords:
-sudo docker volume create mysql-data
-sudo docker run -d --restart unless-stopped --log-opt max-size=10m \
+docker volume create mysql-data
+docker run -d --restart unless-stopped --log-opt max-size=10m \
   -v mysql-data:/var/lib/mysql \
   -e MYSQL_ROOT_PASSWORD=rootpass
   -e MYSQL_DATABASE=freshrss \
@@ -99,11 +99,11 @@ sudo docker run -d --restart unless-stopped --log-opt max-size=10m \
 ### [PostgreSQL](https://hub.docker.com/_/postgres/)
 ```sh
 # If you already have a PostgreSQL instance running, just attach it to the FreshRSS network:
-sudo docker network connect freshrss-network postgres
+docker network connect freshrss-network postgres
 
 # Otherwise, start a new PostgreSQL instance, remembering to change the passwords:
-sudo docker volume create pgsql-data
-sudo docker run -d --restart unless-stopped --log-opt max-size=10m \
+docker volume create pgsql-data
+docker run -d --restart unless-stopped --log-opt max-size=10m \
   -v pgsql-data:/var/lib/postgresql/data \
   -e POSTGRES_DB=freshrss \
   -e POSTGRES_USER=freshrss \
@@ -121,14 +121,14 @@ or use the command line described below.
 
 ```sh
 # Rebuild an image (see build section above) or get a new online version:
-sudo docker pull freshrss/freshrss
+docker pull freshrss/freshrss
 # And then
-sudo docker stop freshrss
-sudo docker rename freshrss freshrss_old
+docker stop freshrss
+docker rename freshrss freshrss_old
 # See the run section above for the full command
-sudo docker run ... --name freshrss freshrss/freshrss
+docker run ... --name freshrss freshrss/freshrss
 # If everything is working, delete the old container
-sudo docker rm freshrss_old
+docker rm freshrss_old
 ```
 
 
@@ -153,17 +153,16 @@ Note that prebuilt images are less recent and only available for x64 (Intel, AMD
 # First time only
 git clone https://github.com/FreshRSS/FreshRSS.git
 
-cd ./FreshRSS/
+cd FreshRSS/
 git pull
-sudo docker pull ubuntu:18.10
-sudo docker build --tag freshrss/freshrss -f Docker/Dockerfile .
+docker build --pull --tag freshrss/freshrss -f Docker/Dockerfile .
 ```
 
 
 ## Command line
 
 ```sh
-sudo docker exec --user apache -it freshrss php ./cli/list-users.php
+docker exec --user apache -it freshrss php ./cli/list-users.php
 ```
 
 See the [CLI documentation](../cli/) for all the other commands.
@@ -173,14 +172,14 @@ See the [CLI documentation](../cli/) for all the other commands.
 
 ```sh
 # See FreshRSS data if you use Docker volume
-sudo docker volume inspect freshrss-data
+docker volume inspect freshrss-data
 sudo ls /var/lib/docker/volumes/freshrss-data/_data/
 
 # See Web server logs
-sudo docker logs -f freshrss
+docker logs -f freshrss
 
 # Enter inside FreshRSS docker container
-sudo docker exec -it freshrss sh
+docker exec -it freshrss sh
 ## See FreshRSS root inside the container
 ls /var/www/FreshRSS/
 ```
@@ -198,7 +197,7 @@ containing a valid cron minute definition such as `'13,43'` (recommended) or `'*
 Not passing the `CRON_MIN` environment variable – or setting it to empty string – will disable the cron daemon.
 
 ```sh
-sudo docker run ... \
+docker run ... \
   -e 'CRON_MIN=13,43' \
   --name freshrss freshrss/freshrss
 ```
@@ -221,7 +220,7 @@ See cron option 1 for customising the cron schedule.
 
 #### For the Ubuntu image (default)
 ```sh
-sudo docker run -d --restart unless-stopped --log-opt max-size=10m \
+docker run -d --restart unless-stopped --log-opt max-size=10m \
   -v freshrss-data:/var/www/FreshRSS/data \
   -e 'CRON_MIN=17,47' \
   --net freshrss-network \
@@ -231,7 +230,7 @@ sudo docker run -d --restart unless-stopped --log-opt max-size=10m \
 
 #### For the Alpine image
 ```sh
-sudo docker run -d --restart unless-stopped --log-opt max-size=10m \
+docker run -d --restart unless-stopped --log-opt max-size=10m \
   -v freshrss-data:/var/www/FreshRSS/data \
   -e 'CRON_MIN=27,57' \
   --net freshrss-network \
@@ -248,7 +247,7 @@ Changes in Apache `.htaccess` files are applied when restarting the container.
 In particular, if you want FreshRSS to use HTTP-based login (instead of the easier Web form login), you can mount your own `./FreshRSS/p/i/.htaccess`:
 
 ```
-sudo docker run ...
+docker run ...
   -v /your/.htaccess:/var/www/FreshRSS/p/i/.htaccess \
   -v /your/.htpasswd:/var/www/FreshRSS/data/.htpasswd \
   ...
@@ -276,7 +275,7 @@ A [docker-compose.yml](docker-compose.yml) file is given as an example, using Po
 
 You can then launch the stack (FreshRSS + PostgreSQL) with:
 ```sh
-sudo docker-compose up -d
+docker-compose up -d
 ```
 
 ### Alternative reverse proxy using [nginx](https://docs.nginx.com/nginx/admin-guide/web-server/reverse-proxy/)