Docker image doesn't set charset in Content-Type

Q&A (please complete the following information)

• OS: Linux Mint 21.3
• Browser: chrome, curl
• Version: 126.0.6478.126, 7.81.0
• Method of installation: docker pull
• Swagger-UI version: latest
• Swagger/OpenAPI version: latest

Content & configuration

Describe the bug you're encountering

Trying to use the docker image from https://hub.docker.com/r/swaggerapi/swagger-ui may fail because the internal nginx server is not configured to add charset: utf-8 to the Content-Type header. As a result, HTML that doesn't specify the charset (eg, <script src="localhost:8081/swagger-ui-bundle.js"></script>) will fail because the browser fetches swagger JS files but won't use them because of the embedded UTF characters.

To reproduce...

$ cat > docker-compose.yaml <<EOF
services:
  swagger-ui:
    image: swaggerapi/swagger-ui
    ports:
      - "8081:8080"
EOF
$ docker compose up -d

$ curl -s -D - -o /dev/null localhost:8081/swagger-ui-bundle.js | grep Content-Type:
Content-Type: application/javascript

Expected behavior

I expect that the Content-Type header includes charset=utf-8.

$ curl -s -D - -o /dev/null localhost:8081/swagger-ui-bundle.js | grep Content-Type:
Content-Type: application/javascript; charset=utf-8

Screenshots

Additional context or thoughts

This is more of a FYI for others in the future who are scratching their heads over why a simple swagger install doesn't seem to work. If that's you, add charset="UTF-8" to your <script> tag.

Start with the docker-compose.yaml reproduction and inspect the Docker image's internal nginx configuration. Verify the response with the provided curl command; done means the JavaScript Content-Type includes charset=utf-8.