diff --git a/DEPLOYMENT.md b/DEPLOYMENT.md
index 5baf8da..46f8b9a 100644
--- a/DEPLOYMENT.md
+++ b/DEPLOYMENT.md
@@ -10,7 +10,12 @@ The deployment model is expected to follow the shared dev, QA, and production br
 - `DATABASE_URL` should target the environment-specific PostgreSQL instance.
 - Stripe and email provider secrets live in environment variables.
 
+## Port Mapping
+
+- Dev: host port `7003` -> container port `3000`
+- QA: host port `6003` -> container port `3000`
+- Production: host port `5003` -> container port `3000`
+
 ## Health Check
 
 - `GET /api/health` returns a lightweight JSON readiness response.
-
diff --git a/PROJECT.md b/PROJECT.md
index 9e4a8f9..954ce56 100644
--- a/PROJECT.md
+++ b/PROJECT.md
@@ -26,8 +26,8 @@ Phase 1 scaffold started from the approved planning docs.
 - Base styling
 - Prisma schema
 - Health endpoint
+- Environment ports aligned to `7003`, `6003`, and `5003` for dev, QA, and production
 
 ## Next Build Step
 
 - Wire the first data-backed screens after the foundation is in place.
-
diff --git a/README.md b/README.md
index 50543d5..3773aa8 100644
--- a/README.md
+++ b/README.md
@@ -4,7 +4,7 @@ Planning workspace for the new project based on the functional specification.
 
 ## Current Status
 
-Phase 1 scaffold has started. The repo now contains the Next.js app shell, Prisma schema, Docker entrypoint, and baseline project docs.
+Phase 1 scaffold has started. The repo now contains the Next.js app shell, Prisma schema, Docker entrypoint, and baseline project docs. Environment ports are mapped to `7003` for Dev, `6003` for QA, and `5003` for Production.
 
 ## Working Rule
 
diff --git a/docker-compose.dev.yml b/docker-compose.dev.yml
index 21d9e24..2e38daa 100644
--- a/docker-compose.dev.yml
+++ b/docker-compose.dev.yml
@@ -8,5 +8,4 @@ services:
       NODE_ENV: development
       NEXT_PUBLIC_SITE_URL: http://localhost:3000
     ports:
-      - "${WEB_PORT:-3000}:3000"
-
+      - "${WEB_PORT:-7003}:3000"
diff --git a/docker-compose.prod.yml b/docker-compose.prod.yml
index f1d5ecb..c59cfb6 100644
--- a/docker-compose.prod.yml
+++ b/docker-compose.prod.yml
@@ -4,5 +4,4 @@ services:
       NODE_ENV: production
       NEXT_PUBLIC_SITE_URL: ${NEXT_PUBLIC_SITE_URL:-https://example.com}
     ports:
-      - "${WEB_PORT:-3002}:3000"
-
+      - "${WEB_PORT:-5003}:3000"
diff --git a/docker-compose.qa.yml b/docker-compose.qa.yml
index 91c0715..419e036 100644
--- a/docker-compose.qa.yml
+++ b/docker-compose.qa.yml
@@ -4,5 +4,4 @@ services:
       NODE_ENV: production
       NEXT_PUBLIC_SITE_URL: ${NEXT_PUBLIC_SITE_URL:-http://localhost:3001}
     ports:
-      - "${WEB_PORT:-3001}:3000"
-
+      - "${WEB_PORT:-6003}:3000"