feat: Initial OPHION structure

- Go backend with Fiber framework
- Agent for metrics collection
- Docker Compose for self-hosted
- Auth middleware (JWT + API Keys)
- Rate limiting
- Install script

deploy/docker/Dockerfile.server

@@ -0,0 +1,13 @@
+FROM golang:1.22-alpine AS builder
+WORKDIR /app
+COPY go.mod go.sum ./
+RUN go mod download
+COPY . .
+RUN CGO_ENABLED=0 GOOS=linux go build -o ophion-server ./cmd/server
+
+FROM alpine:3.19
+RUN apk --no-cache add ca-certificates
+WORKDIR /app
+COPY --from=builder /app/ophion-server .
+EXPOSE 8080
+CMD ["./ophion-server"]