chore: add app service with cargo-watch

Spins up a container with Tranquil running, but automatically uses incremental rebuilds for local dev.

Signed-off-by: Trezy <tre@trezy.com>

Dockerfile.dev

@@ -0,0 +1,20 @@
+FROM rust:1.92-alpine
+
+RUN apk add --no-cache \
+    ca-certificates \
+    musl-dev \
+    pkgconfig \
+    openssl-dev \
+    openssl-libs-static \
+    mold \
+    clang \
+    protoc
+
+RUN cargo install cargo-watch
+
+ENV RUSTFLAGS="-C linker=clang -C link-arg=-fuse-ld=mold"
+ENV SQLX_OFFLINE=true
+
+WORKDIR /app
+
+CMD ["cargo", "watch", "-x", "run -p tranquil-server -- --config /app/config.dev.toml"]

config.dev.toml

@@ -0,0 +1,30 @@
+[server]
+hostname = "pds.test"
+allow_http_proxy = true
+invite_code_required = false
+disable_rate_limiting = true
+
+[frontend]
+enabled = true
+dir = "/app/frontend/public"
+
+[database]
+url = "postgres://postgres:postgres@db:5432/pds"
+
+[storage]
+path = "/var/lib/tranquil-pds/blobs"
+
+[plc]
+directory_url = "http://plc:2582"
+
+[email]
+from_address = "noreply@pds.test"
+from_name = "Tranquil PDS (Dev)"
+
+[email.smarthost]
+host = "mailpit"
+port = 1025
+tls = "none"
+
+[secrets]
+allow_insecure = true

docker-compose.yaml

@@ -17,6 +17,35 @@ services:
       db:
         condition: service_healthy
 
+  app-dev:
+    profiles: [dev]
+    build:
+      context: .
+      dockerfile: Dockerfile.dev
+    command: >
+      sh -c '
+        cp /certs/pds.test.pem /usr/local/share/ca-certificates/pds.test.crt
+        update-ca-certificates
+        cargo watch -x "run -p tranquil-server --features native-tls-roots -- --config /app/config.dev.toml"
+      '
+    environment:
+      SERVER_HOST: "0.0.0.0"
+      SQLX_OFFLINE: "true"
+      PLC_DIRECTORY_URL: "http://plc:2582"
+    volumes:
+      - ./:/app
+      - cargo_target:/app/target
+      - cargo_registry:/usr/local/cargo/registry
+      - blob_data:/var/lib/tranquil-pds/blobs
+      - certs:/certs:ro
+    depends_on:
+      traefik:
+        condition: service_started
+      db:
+        condition: service_healthy
+      plc:
+        condition: service_started
+
   frontend:
     profiles: [prod]
     build:
@@ -108,4 +137,6 @@ volumes:
   blob_data:
   store_data:
   prometheus_data:
+  cargo_target:
+  cargo_registry:
   certs: