diff --git a/network-poc/.dockerignore b/network-poc/.dockerignore
new file mode 100644
index 0000000..cf09a1b
--- /dev/null
+++ b/network-poc/.dockerignore
@@ -0,0 +1,5 @@
+target/
+target-native/
+static/pkg/
+.git/
+*.md
diff --git a/network-poc/Caddyfile.prod b/network-poc/Caddyfile.prod
index 8b860c2..733aaa3 100644
--- a/network-poc/Caddyfile.prod
+++ b/network-poc/Caddyfile.prod
@@ -1,3 +1,5 @@
 kipina.studio {
-    reverse_proxy hub:3000
+    reverse_proxy hub:3000 {
+        header_up X-Forwarded-For {remote_host}
+    }
 }
diff --git a/network-poc/Dockerfile.prod b/network-poc/Dockerfile.prod
index 63d427f..e486f85 100644
--- a/network-poc/Dockerfile.prod
+++ b/network-poc/Dockerfile.prod
@@ -7,7 +7,29 @@ RUN apt-get update && apt-get install -y \
 RUN curl https://rustwasm.github.io/wasm-pack/installer/init.sh -sSf | sh
 
 WORKDIR /app
-COPY . .
+
+# 1. Kopioi vain Cargo-tiedostot → riippuvuudet cacheen
+COPY Cargo.toml Cargo.lock ./
+COPY hub/Cargo.toml hub/Cargo.toml
+COPY node/Cargo.toml node/Cargo.toml
+COPY native-node/Cargo.toml native-node/Cargo.toml
+
+# Tyhjät lähteet riippuvuuksien esikääntämistä varten
+RUN mkdir -p hub/src node/src native-node/src \
+    && echo "fn main(){}" > hub/src/main.rs \
+    && echo "" > node/src/lib.rs \
+    && mkdir -p node/src && touch node/src/storage.rs \
+    && echo "fn main(){}" > native-node/src/main.rs \
+    && cargo build --release -p hub 2>/dev/null || true \
+    && wasm-pack build node --target web --out-dir ../static/pkg 2>/dev/null || true
+
+# 2. Kopioi oikea lähdekoodi → vain src käännetään uudelleen
+COPY hub/src hub/src
+COPY node/src node/src
+COPY static static
+
+# Pakota uudelleenkäännös
+RUN touch hub/src/main.rs node/src/lib.rs
 
 # Rakenna Wasm-paketti
 RUN cd node && wasm-pack build --target web --out-dir ../static/pkg
diff --git a/network-poc/hub/src/main.rs b/network-poc/hub/src/main.rs
index d615abc..125461d 100644
--- a/network-poc/hub/src/main.rs
+++ b/network-poc/hub/src/main.rs
@@ -142,11 +142,11 @@ async fn ws_handler(
     {
         let conns = state.ip_connections.lock().unwrap();
         let count = conns.get(&ip).copied().unwrap_or(0);
-        if count >= 2 {
-            tracing::warn!("IP {} ylitti yhteysrajan ({}/2) — estetty", ip, count);
+        if count >= 4 {
+            tracing::warn!("IP {} ylitti yhteysrajan ({}/4) — estetty", ip, count);
             return (
                 axum::http::StatusCode::TOO_MANY_REQUESTS,
-                "Max 2 yhteyttä per IP",
+                "Max 4 yhteyttä per IP",
             ).into_response();
         }
     }