Update node version to 14.x and fix angular build
Update node version to 14.x and fix angular build

Update node version, to 14.x so angular can be build and avoid this error: 

```
 => [builder  5/16] COPY test-cases/javascript/frameworks/angular /tmp/angular                                                                                                                                                                  0.0s 
 => [builder  6/16] WORKDIR /tmp/angular                                                                                                                                                                                                        0.0s 
 => [builder  7/16] RUN npm install                                                                                                                                                                                                            19.0s 
 => ERROR [builder  8/16] RUN ng build --prod --baseHref=/javascript/frameworks/angular/                                                                                                                                                        0.2s 
------                                                                                                                                                                                                                                               
 > [builder  8/16] RUN ng build --prod --baseHref=/javascript/frameworks/angular/:                                                                                                                                                                   
#24 0.209 Node.js version v10.24.1 detected.                                                                                                                                                                                                         
#24 0.209 The Angular CLI requires a minimum Node.js version of either v12.20, v14.15, or v16.10.                                                                                                                                                    
#24 0.209                                                                                                                                                                                                                                            
#24 0.209 Please update your Node.js version or visit https://nodejs.org/ for additional instructions.
#24 0.209 
------
executor failed running [/bin/sh -c ng build --prod --baseHref=/javascript/frameworks/angular/]: exit code: 3
```
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