Add feedback api (#123)

Adds feedback api as a docker-compose service as well as a dummy smtp server.

.gitmodules

@@ -1,3 +1,6 @@
 [submodule "client/vendor/wormhole-william"]
 	path = client/vendor/wormhole-william
 	url = [email protected]:LeastAuthority/wormhole-william.git
+[submodule "feedback-api/feedback-api"]
+	path = feedback-api
+	url = [email protected]:LeastAuthority/feedback-api.git

README.md

@@ -74,6 +74,12 @@ docker compose run -p 8080:8080 client gulp watch # equivalent command
 docker compose logs -f
 ```
 
+#### Email from Feedback API
+We use a dummy SMTP server to log emails sent from `feedback-api`. To view the emails, run the following command:
+```sh
+docker compose logs -f dummy-smtp-server
+```
+
 ### Stop development environment
 
 ```sh

docker-compose.yml

@@ -21,6 +21,33 @@ services:
     depends_on:
       - mailbox
       - relay
+      - feedback-api
+  feedback-api:
+    build: ./feedback-api
+    command:
+      [
+        "/app/feedback-api",
+        "-to",
+        "[email protected]",
+        "-smtp-server",
+        "dummy-smtp-server",
+        "-smtp-port",
+        "1025",
+      ]
+    ports:
+      - "8001:8001"
+    depends_on:
+      - dummy-smtp-server
+    environment:
+      - SMTP_USE_TLS=false
+      - [email protected]
+      - SMTP_PASSWORD=barbazquux
+  dummy-smtp-server:
+    build: ./feedback-api/docker/smtp-server
+    ports:
+      - "1025:1025"
+    environment:
+      - PYTHONUNBUFFERED=1
   # build to run in CI
   client-ci:
     build: ./client