chore: use port 3001 by default

Update the API to run on port 3001 by default.  This will prevent
local port clashes with the form viewer's default port.

Dockerfile

@@ -12,6 +12,6 @@ RUN yarn install
 # Copy local code to the container image.
 COPY . .
 
-EXPOSE 3000
+EXPOSE 3001
 
 ENTRYPOINT [ "yarn", "start"]

README.md

@@ -10,4 +10,4 @@ Machine-to-machine interface for downloading form submissions.
 
 `docker build -t forms-api .`
 
-`docker run -p 3000:3000 forms-api`
+`docker run -p 3001:3001 forms-api`

index.js

@@ -3,7 +3,7 @@ import { initialize } from 'express-openapi';
 
 
 const app = new express();
-const port = process.env.PORT || 3000;
+const port = process.env.PORT || 3001;
 
 initialize({
   app,