feat: Initial minimal docker compose and updates to release workflows.

docker/docker-compose.yaml

@@ -0,0 +1,22 @@
+
+services:
+  db:
+    image: docker.io/postgres:18
+    restart: unless-stopped
+    env_file: .env
+    volumes:
+      - ./data:/var/lib/postgresql
+  
+  app:
+    image: ghcr.io/m-housh/ductcalc:latest
+    restart: unless-stopped
+    env_file: .env
+    depends_on:
+      - db
+    ports:
+      - 8080:8080
+    healthcheck:
+      test: curl --fail --silent http://0.0.0.0:8080/health || exit 1
+      interval: 1m
+      timeout: 10s
+      retries: 3

docker/example.env

@@ -0,0 +1,20 @@
+# Shared with database & app
+POSTGRES_USER=ductcalc
+POSTGRES_PASSWORD=super-secret-change-me
+POSTGRES_DB=ductcalc
+
+# App only
+#
+POSTGRES_HOSTNAME=db
+
+# If using sqlite not postgres
+#SQLITE_PATH=db.sqlite
+
+# Set the pdf engine to use, this generally does not
+# need set, unless extending the base image.
+#PDF_ENGINE=weasyprint
+
+# Set the path to the pandoc executable. This generally
+# does not need set, unless extending the base image.
+#PANDOC_PATH=/usr/bin/pandoc
+