Added an example directory with docker-compose

docker-compose.yaml

@@ -1,5 +0,0 @@
-services:
-  docker-cron-git-pull:
-    image: testing
-    volumes:
-      - ./logs:/logs

example/README.md

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+# Simple example
+
+This demonstrates the basic functionality of the git-puller image.
+
+
+## How to get this working
+
+First, build the image. Therefore, see section Building in the projects root README.md.
+
+Second, our git-puller needs some git repository to keep up-to-date. So just clone any git repository into the to-pull folder and see what happens when you run it.
+
+How to run it? Just use `docker compose up -d` in this folder!

example/docker-compose.yaml

@@ -0,0 +1,10 @@
+services:
+  git-puller:
+    image: git-puller
+    volumes:
+      - ./to-pull:/to-pull
+    environment:
+      PULL_LOCATION: "/to-pull"  # the folder with the git repo to pull
+      PULL_INTERVAL: 10  # time in seconds between pulls (minimum is 5)
+      GIT_OUTPUT: "0"  # if this is 0, the git command's stdout will not be shown in 'docker logs'
+      PULLER_UID: "1000"  # the uid of the user that executes the 'git pull' command in the container (if set to 0, root will do it!)