Add slack example

examples/slack/.dockerenv.example

@@ -0,0 +1,21 @@
+SLACK_APP_TOKEN=xapp-
+SLACK_BOT_TOKEN=xoxb-
+OPENAI_API_KEY=fake
+
+OPENAI_SYSTEM_TEXT=Default System Text
+OPENAI_TIMEOUT_SECONDS=30
+OPENAI_MODEL=gpt-3.5-turbo
+USE_SLACK_LANGUAGE=true
+SLACK_APP_LOG_LEVEL=DEBUG
+TRANSLATE_MARKDOWN=false
+OPENAI_API_BASE=http://localhost:8080/v1
+EMBEDDINGS_MODEL=all-MiniLM-L6-v2
+EMBEDDINGS_API_BASE=http://localhost:8080/v1
+LOCALAI_API_BASE=http://localhost:8080/v1
+TTS_API_BASE=http://localhost:8080/v1
+IMAGES_API_BASE=http://localhost:8080/v1
+STABLEDIFFUSION_MODEL=dreamshaper
+FUNCTIONS_MODEL=gpt-3.5-turbo
+LLM_MODEL=gpt-3.5-turbo
+TTS_MODEL=en-us-kathleen-low.onnx
+PERSISTENT_DIR=/data