Add EUA to keep gateway clean

[nithindv]

EUA to assist EkSaath / Stepone integrate with Gateway

Env Vars:

• JWT_SECRET
• DOMAIN
• GATEWAY_DOMAIN

Middlewares

Auth middleware - Validate JWT - ensure signature valid, and not expired - ref,

C19CareAssist/gateway/src/utils/auth-helper.ts

Line 14 in b6d1956

verify(type: string, token: string) {

C19CareAssist/gateway/src/middleware/auth.ts

Line 8 in b6d1956

export const isAuthenticated = (req: Request, res: Response, next: NextFunction) => {

1. In /search/service,
   • Forward the received token as is to the gateway
   • Authenticate with the gateway via username password and login
2. In on_update/service
   • Validate the received authToken via configured JKS public key; allowed auth methods are RSA256, ex jwt.verify(token, publickey, { algorithms: ["RSA256"] });

Endpoints:

v1/on_update/service - Log request and respond with 200 for now
v1/search/service - Construct gateway URL from env var and move logic from gateway middleware - ref, https://github.com/Swasth-Digital-Health-Foundation/C19CareAssist/blob/feature/middleware-for-search-api/gateway/src/middleware/doctorConfirmation.ts

Deployment

Add dockerfile and ensure docker build works as expected - ref, https://github.com/Swasth-Digital-Health-Foundation/C19CareAssist/blob/main/o2-provider/Dockerfile

@yath-tw
@rameez25