--no-install-recommends to trim image size

Dockerfile

@@ -23,15 +23,16 @@ RUN mkdir src && \
     echo "fn main() {}" > src/server.rs && \
     echo "pub fn lib() {}" > src/lib.rs && \
     cargo build --release && \
-    rm -rf src
+    rm -rf src target/release/webterm-server target/release/deps/webterm*
 
 # Copy actual source code
 COPY src ./src
 COPY templates ./templates
 COPY static ./static
 
-# Build the actual application
-RUN cargo build --release && \
+# Build the actual application (force rebuild by touching sources)
+RUN touch src/server.rs src/lib.rs && \
+    cargo build --release && \
     strip target/release/webterm-server
 
 # ============================================================================