Add example app.yaml and oauth2_proxy.cfg

example-app.yaml

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+runtime: custom
+env: flex
+threadsafe: true
+resources:
+  memory_gb: 32
+  cpu: 8
+automatic_scaling:
+  max_num_instances: 1
+env_variables:
+  EVENT_FILE_PATH: gs://ml-workshop/output/mnist_hptuning10
+  RELOAD_INTERVAL: 1
+  GCS_PROXY_CONFIG: gs://ml-workshop/oauth2_proxy.cfg

example_oauth2_proxy.cfg

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+## OAuth2 Proxy Config File
+## https://github.com/bitly/oauth2_proxy
+
+## <addr>:<port> to listen on for HTTP/HTTPS clients
+# http_address = "127.0.0.1:4180"
+# https_address = ":443"
+
+## TLS Settings
+# tls_cert_file = ""
+# tls_key_file = ""
+
+## the OAuth Redirect URL.
+# defaults to the "https://" + requested host header + "/oauth2/callback"
+# redirect_url = "https://internalapp.yourcompany.com/oauth2/callback"
+
+## the http url(s) of the upstream endpoint. If multiple, routing is based on path
+# upstreams = [
+#     "http://127.0.0.1:8080/"
+# ]
+
+## Log requests to stdout
+# request_logging = true
+
+## pass HTTP Basic Auth, X-Forwarded-User and X-Forwarded-Email information to upstream
+# pass_basic_auth = true
+## pass the request Host Header to upstream
+## when disabled the upstream Host is used as the Host Header
+# pass_host_header = true
+
+## Email Domains to allow authentication for (this authorizes any email on this domain)
+## for more granular authorization use `authenticated_emails_file`
+## To authorize any email addresses use "*"
+email_domains = [
+    "google.com"
+]
+
+## The OAuth Client ID, Secret
+client_id = "my-client-id"
+client_secret = "myclientsecret"
+
+## Pass OAuth Access token to upstream via "X-Forwarded-Access-Token"
+# pass_access_token = false
+
+## Authenticated Email Addresses File (one email per line)
+# authenticated_emails_file = ""
+
+## Htpasswd File (optional)
+## Additionally authenticate against a htpasswd file. Entries must be created with "htpasswd -s" for SHA encryption
+## enabling exposes a username/login signin form
+# htpasswd_file = ""
+
+## Templates
+## optional directory with custom sign_in.html and error.html
+# custom_templates_dir = ""
+
+## Cookie Settings
+## Name     - the cookie name
+## Secret   - the seed string for secure cookies; should be 16, 24, or 32 bytes
+##            for use with an AES cipher when cookie_refresh or pass_access_token
+##            is set
+## Domain   - (optional) cookie domain to force cookies to (ie: .yourcompany.com)
+## Expire   - (duration) expire timeframe for cookie
+## Refresh  - (duration) refresh the cookie when duration has elapsed after cookie was initially set.
+##            Should be less than cookie_expire; set to 0 to disable.
+##            On refresh, OAuth token is re-validated. 
+##            (ie: 1h means tokens are refreshed on request 1hr+ after it was set)
+## Secure   - secure cookies are only sent by the browser of a HTTPS connection (recommended)
+## HttpOnly - httponly cookies are not readable by javascript (recommended)
+# cookie_name = "_oauth2_proxy"
+# cookie_secret = ""
+# cookie_domain = ""
+# cookie_expire = "168h"
+# cookie_refresh = ""
+# cookie_secure = true
+# cookie_httponly = true