fix(ci): build single Rust service with workspace-safe Dockerfile

Dockerfile.simple

@@ -7,7 +7,7 @@ FROM rust:alpine AS builder
 ARG SERVICE_NAME
 
 # Install deps
-RUN apk add --no-cache musl-dev pkgconfig openssl-dev && \
+RUN apk add --no-cache musl-dev pkgconfig openssl-dev openssl-libs-static && \
     rustup target add x86_64-unknown-linux-musl
 
 WORKDIR /app
@@ -16,11 +16,33 @@ WORKDIR /app
 COPY Cargo.toml Cargo.lock ./
 COPY crates/ ./crates/
 
-# Copy the specific service
+# Copy only the target service source (fast path for matrix builds).
 COPY apps/${SERVICE_NAME}/ ./apps/${SERVICE_NAME}/
 
+# Restrict workspace members to the selected service + shared crates.
+# This avoids requiring every `apps/*` manifest while preserving workspace deps.
+RUN awk -v svc="${SERVICE_NAME}" '\
+  BEGIN { in_members = 0 } \
+  /^members = \[/ { \
+    print "members = ["; \
+    print "  \"apps/" svc "\","; \
+    print "  \"crates/contracts\","; \
+    print "  \"crates/db\","; \
+    print "  \"crates/auth\","; \
+    print "  \"crates/storage\","; \
+    print "  \"crates/cache\","; \
+    print "  \"crates/email\""; \
+    in_members = 1; \
+    next; \
+  } \
+  in_members && /^\]/ { in_members = 0; print "]"; next } \
+  in_members { next } \
+  { print }' Cargo.toml > Cargo.toml.tmp && mv Cargo.toml.tmp Cargo.toml
+
 # Build with all optimizations
 ENV RUSTFLAGS="-C target-feature=+crt-static -C link-arg=-s"
+ENV OPENSSL_STATIC=1
+ENV OPENSSL_DIR=/usr
 RUN cargo build --release \
     --bin ${SERVICE_NAME} \
     --target x86_64-unknown-linux-musl