add working docker-compose example, fix rpardini#69

Author: rpardini

Diff for: .gitignore

@@ -1,4 +1,4 @@
 .idea
 *.iml
-docker_mirror_cache
-docker_mirror_certs
+**/docker_mirror_cache
+**/docker_mirror_certs

Diff for: docs/compose/docker-compose.yml

@@ -0,0 +1,16 @@
+version: '3.7'
+
+services:
+  docker_registry_proxy:
+    image: rpardini/docker-registry-proxy:0.6.0 # Check and make sure this is the last released version
+    env_file: # This contains REGISTRIES and AUTH_REGISTRIES
+      - ./secrets.env
+    environment:
+      - CACHE_MAX_SIZE=256g
+      - ENABLE_MANIFEST_CACHE=true
+    volumes:
+      # Format: <host-path>:<container-path>; adapt to your needs
+      - ./docker_mirror_cache:/docker_mirror_cache # This will be up to CACHE_MAX_SIZE big
+      - ./docker_mirror_certs:/ca
+    ports:
+      - 0.0.0.0:3128:3128 # 0.0.0.0 binds to all interfaces

Diff for: docs/compose/secrets.env

@@ -0,0 +1,3 @@
+# DockerHub authentication
+REGISTRIES="k8s.gcr.io gcr.io quay.io" # There is no need to specify auth.docker.io, it's built-in
+AUTH_REGISTRIES="auth.docker.io:your_dockerhub_username:your_dockerhub_password"