feat(webapp): popup Plaid Link component

.env.example

@@ -63,4 +63,33 @@ GOTENBERG_DOCS_URL=http://server:3000/public/
 EXCHANGE_RATE_SERVICE=open-exchange-rate
 
 # Open Exchange Rate
-OPEN_EXCHANGE_RATE_APP_ID=
+OPEN_EXCHANGE_RATE_APP_ID=
+
+# The Plaid environment to use ('sandbox' or 'development').
+# https://plaid.com/docs/#api-host
+PLAID_ENV=sandbox
+
+# Your Plaid keys, which can be found in the Plaid Dashboard.
+# https://dashboard.plaid.com/account/keys
+PLAID_CLIENT_ID=
+PLAID_SECRET_DEVELOPMENT=
+PLAID_SECRET_SANDBOX=
+
+# (Optional) Redirect URI settings section
+# Only required for OAuth redirect URI testing (not common on desktop):
+# Sandbox Mode:
+# Set the PLAID_SANDBOX_REDIRECT_URI below to 'http://localhost:3001/oauth-link'.
+# The OAuth redirect flow requires an endpoint on the developer's website
+# that the bank website should redirect to. You will also need to configure
+# this redirect URI for your client ID through the Plaid developer dashboard
+# at https://dashboard.plaid.com/team/api.
+# Development mode:
+# When running in development mode, you must use an https:// url.
+# You will need to configure this https:// redirect URI in the Plaid developer dashboard.
+# Instructions to create a self-signed certificate for localhost can be found at
+# https://github.com/plaid/pattern/blob/master/README.md#testing-oauth.
+# If your system is not set up to run localhost with https://, you will be unable to test
+# the OAuth in development and should leave the PLAID_DEVELOPMENT_REDIRECT_URI blank.
+
+PLAID_SANDBOX_REDIRECT_URI=
+PLAID_DEVELOPMENT_REDIRECT_URI=