[Feature] Change to nginx-unprivileged image for better kubernetes support (#1922)

Breaking change: Port number for Docker Image has changed from 80 to 8080

Dockerfile

@@ -27,7 +27,7 @@ RUN npm run build
 #########################################
 # Package static build files into nginx #
 #########################################
-FROM nginx:stable-alpine AS cyberchef
+FROM nginxinc/nginx-unprivileged:stable-alpine AS cyberchef
 
 LABEL maintainer="GCHQ <oss@gchq.gov.uk>"
 

README.md

@@ -36,7 +36,7 @@ docker build --tag cyberchef --ulimit nofile=10000 .
 ```
 2. Run the docker container
 ```bash
-docker run -it -p 8080:80 cyberchef
+docker run -it -p 8080:8080 cyberchef
 ```
 3. Navigate to `http://localhost:8080` in your browser
 
@@ -45,7 +45,7 @@ docker run -it -p 8080:80 cyberchef
 If you prefer to skip the build process, you can use the pre-built image
 
 ```bash
-docker run -it -p 8080:80 ghcr.io/gchq/cyberchef:latest
+docker run -it -p 8080:8080 ghcr.io/gchq/cyberchef:latest
 ```
 
 Just like before, navigate to `http://localhost:8080` in your browser.