Github action (Forkable)

[commjoen]

• create Base64 encoded ciphertext and embed as content in application.properties
• Embed plaintext in java file hardcoded
• put key as github action secret which can be retrieved through forking and exfiltrated with double base64 encoding
• make sure there are 2 secrets to be leaked: a fake build-secret and the decryption/encryption key and ensure that the expalantion shows why it is important to safeguard build secrets.
• refer to https://github.com/SpiderLabs/CryptOMG for more crypto in the comments ;-)

[commjoen]

Fixed in #181 and #177