Refactor Package structure

This commit cleans up the package structure, to make two new top-level
packages `internal` (for internal-use packages) and `pkg` (for general
shared utility code).

internal/component/self/stack/docker-compose.yml

@@ -0,0 +1,28 @@
+version: "3.7"
+
+services:
+  tr:
+    image: ghcr.io/tkw1536/tr:latest
+    restart: always
+    volumes:
+      - "${OVERRIDES_FILE}:/overrides.json:ro"
+    environment:
+      # port and hostname for this image to use
+      VIRTUAL_HOST: ${VIRTUAL_HOST}
+      VIRTUAL_PORT: 8080
+      VIRTUAL_PATH: /
+      
+      # optional letsencrypt email
+      LETSENCRYPT_HOST: ${LETSENCRYPT_HOST}
+      LETSENCRYPT_EMAIL: ${LETSENCRYPT_EMAIL}
+
+      # the overrides file
+      OVERRIDES: /overrides.json
+
+      # where to redirect to
+      TARGET: ${TARGET}
+
+networks:
+  default:
+    name: distillery
+    external: true