Added a guide how to install Part-DB via docker.

.dockerignore

@@ -2,7 +2,7 @@ Dockerfile
 docker-compose.yml
 .dockerignore
 tests/
-
+docs/
 .git
 
 ###> symfony/framework-bundle ###

docs/docker/docker-compose.yaml

@@ -0,0 +1,13 @@
+version: '3.3'
+services:
+  partdb:
+    container_name: partdb
+    # By default Part-DB will be running under Port 8080, you can change it here
+    ports:
+      - '8080:80'
+    volumes:
+      # By default
+      - ./uploads:/var/www/html/uploads
+      - ./public_media:/var/www/html/public/media
+    restart: unless-stopped
+    image: jbtronics/part-db1:master

docs/docker/docker-install.md

@@ -0,0 +1,32 @@
+# Installation of Part-DB via docker
+
+**Warning: The methods described here, configure PHP without HTTPS and therefore should only be used locally. If you want to expose Part-DB to the internet, you have to configure a reverse proxy!**
+
+## Docker-compose
+Part-DB can be installed via docker. A pre-built docker image is available under [jbtronics/part-db1](https://hub.docker.com/repository/docker/jbtronics/part-db1/).
+In the moment the master tag should be used (which is built from the latest commits in the master branch), as no tagged releases are available yet.
+
+The easiest way to use it is to use the docker-compose.yml available [here]():
+0. Install docker and docker-compose like described under https://docs.docker.com/compose/install/
+1. Create a folder where the Part-DB data should live
+2. Download docker-compose.yml and move it to the folder created above
+3. Inside the folder, run `docker-compose up -d`
+4. Create the inital database with `docker exec --user=www-data partdb bin/console doctrine:migrations:migrate` and watch for the password output
+5. Part-DB is available under `http://localhost:8080` and you can log in with username `admin` and the password shown before
+
+The docker image uses a SQLite database and all data (database, uploads and other media) is put into folders relative to the docker-compose.yml.
+
+## Direct use of docker image
+You can use the `jbtronics/part-db1:master` image directly. You have to expose the port 80 to a host port and configure volumes for `/var/www/html/uploads` and `/var/www/html/public/media`.
+
+You also have to create the database like described above in step 4.
+
+## Running console commands
+You can run the console commands described in README by executing `docker exec --user=www-data -it partdb bin/console [command]`
+
+## Troubleshooting
+
+*Login not possible. Login page is just reloading and no error message is shown or something like "CSFR token invalid"*:
+
+Clear all cookies in your browser or use a inkognito tab for Part-DB.
+This related to the fact that Part-DB can not set cookies via HTTP, after some webpage has set cookies before under localhost via https. This is a security mechanism of the browser and can not be bypassed by Part-DB.