Apply security recommendations

[markhobson]

We need to apply the following security recommendations:

• [x] Enable load balancer logging
• [x] Set load balancer minimum TLS version to 1.2
• [x] Set Cloud Run ingress control to internal
• [x] Remove default network
• [x] Block 45.159.248.69
• [x] Add preconfigured WAF rules:
  • [x] SQL injection
  • [x] Cross-site scripting
  • [x] Local file inclusion
  • [x] Remote file inclusion
  • [x] Remote code execution
  • [x] Method enforcement
  • [x] Scanner detection
  • [x] Protocol attack
  • [x] Session fixation attack