Malformed urls cause breaking of thumbnails and download options of the uploaded layers

[bisceglialuigi]

Expected Behavior

I installed spcgeonode cloning Geonode version 3.1 and executing "docker-compose up -d" in the "geonode/scripts/spcgeonode" folder. After the building and the starting of every container, I expect to:

1. normally visualize layer's thumbnails in the "explore layers" menu for each uploaded layer;
2. correctly download layers from the button "download" in the layer info.

I did not modify anything in the Dockerfiles or .env, so all the default configurations are retained, as host="127.0.0.1" and port "80".

Actual Behavior

1. no thumbnails can be loaded for any layer. Opening the Network tab in the browser
   developer console, it is clear that requests for thumbnails are failing due to wrong urls. Actual url: "http://localhost:8000/uploaded/thumbs/layer-dbd85c1e-55b1-11eb-b789-0242ac140003-thumb.png".
   
   

If I manually change to "http://127.0.0.1/uploaded/thumbs/layer-dbd85c1e-55b1-11eb-b789-0242ac140003-thumb.png" and request it in the browser the thumbnail comes up.

2. Any format of the download option in the layer info is compromised. The requests for any format fail for a reason similar to the point 1. If for example I click Download Layer > Data > GeoJSON, I can see the malformed url "http://localhost:8080/geoserver/ows?service=WFS&version=1.0.0&request=GetFeature&typename=geonode%3Ajoined_layer&outputFormat=json&srs=EPSG%3A32632&srsName=EPSG%3A32632&access_token=jNCuF13KV0yLVKlpe0rAJY3E4F9Haw" in the url bar and no layer content.
   

If I manually fix it to "http://127.0.0.1/geoserver/ows?service=WFS&version=1.0.0&request=GetFeature&typename=geonode%3Ajoined_layer&outputFormat=json&srs=EPSG%3A32632&srsName=EPSG%3A32632&access_token=jNCuF13KV0yLVKlpe0rAJY3E4F9Haw" I can get the resource.

Steps to Reproduce the Problem

1. Git Clone Geonode version 3.1 released on 30 Nov 2020
2. cd into "geonode/scripts/spcgeonode/"
3. execute "docker-compose up -d"
4. upload a layer
5. from the main page: Data > Layers, you can see broken thumbnails
6. from the detail page of an uploaded layer: Download Layer > Data > GeoJSON, you can not see any content.

Specifications

• GeoNode version: 3.1
• Installation method: SPCGeoNode Docker
• Platform: Ubuntu 18.04
• Additional details:

[gannebamm]

See fix here: https://gitter.im/GeoNode/general?at=6013df5b32e01b4f715f1611