Init docker-compose.yml and add documentation

for initial deployment and updates

README.md

@@ -9,3 +9,46 @@ The dockerfile builds a container that uses [feed2toot](https://feed2toot.readth
 * `feed2toot_usercred.txt`: from `register_feed2toot_app` script
 * `feed2toot_cache.db`: cache file to register previous posts
 
+Docker image was built like this and pushed to registry:
+```
+docker build -t registry.greenbaum.cloud/library/mastodon-hackernews-feed2toot:0.0.1 .
+docker push registry.greenbaum.cloud/library/mastodon-hackernews-feed2toot:0.0.1
+```
+
+Initial deployment, just for documentation, **don't run this for updates**:
+```
+# Run the steps from Deployment of updates section
+# After initial deployment, copy secrets and cache file to volume mounted on /data
+❯ find . -name 'feed2toot*' -type f
+./feed2toot.ini
+./secrets/feed2toot_clientcred.txt
+./secrets/feed2toot_cache.db
+./secrets/feed2toot_usercred.txt
+
+❯ for FILE in $(find . -name 'feed2toot*' -type f  -printf "%f\n"); \
+  do \
+    docker cp ./secrets/$FILE bot_mastodon-hackernews-feed2toot_1:/data/$FILE; \
+  done
+❯ docker cp ./feed2toot.ini bot_mastodon-hackernews-feed2toot_1:/data/feed2toot.ini
+
+# Uncomment external option of volume
+```
+
+Deployment of updates:
+1. Get [tritonshell](https://git.greenbaum.cloud/dev/tritonshell)
+2. Enter `tritonshell` for DC `cgn-1`
+```
+cd tritonshell
+nix develop --command $SHELL
+eval "$(triton env cgn-1-pub_solar)"
+cd ..
+
+# Optional
+# Check for running container
+docker ps -a | grep mastodon-hackernews-feed2toot
+```
+
+3. Update running container to a new version
+```
+docker-compose --project-name bot up --detach
+```

docker-compose.yml

@@ -0,0 +1,21 @@
+version: "2.4"
+
+services:
+  mastodon-hackernews-feed2toot:
+    image: registry.greenbaum.cloud/library/mastodon-hackernews-feed2toot:0.0.1
+    mem_limit: 128m
+    restart: always
+    network_mode: My-Fabric-Network
+    volumes:
+      - mastodon-hackernews-feed2toot:/data
+
+volumes:
+  mastodon-hackernews-feed2toot:
+    # Uncomment this after volume creation
+    external: true
+    name: mastodon-hackernews-feed2toot
+    driver: tritonnfs
+    driver_opts:
+      size: "10G"
+    labels:
+      - volumename=mastodon-hackernews-feed2toot