fix(win+docker): updated dockerfile and .dockerignore

[BaptisteHubert]

Please check if the PR fulfills these requirements

• [x] The commit message follows our guidelines
• [x] Tests for the changes have been added (for bug fixes / features)
• [x] Docs have been added / updated (for bug fixes / features)

What kind of change does this PR introduce? (Bug fix, feature, docs update, ...) Update .dockerignore and Dockerfile. Also a fix for the scripts/get-assets.sh (raised an error when building the application with docker), modified to have LF ending and not CRLF ending (automatic change by git)

What is the current behavior? (You can also link to an open issue here) docker-compose up -d build two containers, and the application is working on the port 4200 of the localhost adress of the user's computer #113

[BaptisteHubert]

Steps for testing this fix :

• I tested the code by running a clone of the specific branch on my computer.
• I deleted all mute-related images in my docker engine.
• I cleared the cache of my chrome browser.

When i ran the docker-compose command, the application worked.

[rigelk]

@BaptisteHubert you mention the PR as a fix but don't describe the reason behind the fix in the PR body. You did it in the commit message 👍🏾 but please do it in the PR body as well.