Move Docker-related files to contrib/stella directory and update paths accordingly

contrib/stella/Dockerfile

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+# Dockerfile for Stella's Nostr Relay (next.orly.dev)
+# Owner: npub1v30tsz9vw6ylpz63g0a702nj3xa26t3m7p5us8f2y2sd8v6cnsvq465zjx
+
+FROM golang:alpine AS builder
+
+# Install build dependencies
+RUN apk add --no-cache \
+    git \
+    build-base \
+    autoconf \
+    automake \
+    libtool \
+    pkgconfig
+
+# Install secp256k1 library from Alpine packages
+RUN apk add --no-cache libsecp256k1-dev
+
+# Set working directory
+WORKDIR /build
+
+# Copy go modules first (for better caching)
+COPY ../../go.mod go.sum ./
+RUN go mod download
+
+# Copy source code
+COPY ../.. .
+
+# Build the relay with optimizations from v0.4.8
+RUN CGO_ENABLED=1 GOOS=linux go build -ldflags "-w -s" -o relay .
+
+# Create non-root user for security
+RUN adduser -D -u 1000 stella && \
+    chown -R 1000:1000 /build
+
+# Final stage - minimal runtime image
+FROM alpine:latest
+
+# Install only runtime dependencies
+RUN apk add --no-cache \
+    ca-certificates \
+    curl \
+    libsecp256k1 \
+    libsecp256k1-dev
+
+WORKDIR /app
+
+# Copy binary from builder
+COPY --from=builder /build/relay /app/relay
+
+# Create runtime user and directories
+RUN adduser -D -u 1000 stella && \
+    mkdir -p /data /profiles /app && \
+    chown -R 1000:1000 /data /profiles /app
+
+# Expose the relay port
+EXPOSE 7777
+
+# Set environment variables for Stella's relay
+ENV ORLY_DATA_DIR=/data
+ENV ORLY_LISTEN=0.0.0.0
+ENV ORLY_PORT=7777
+ENV ORLY_LOG_LEVEL=info
+ENV ORLY_MAX_CONNECTIONS=1000
+ENV ORLY_OWNERS=npub1v30tsz9vw6ylpz63g0a702nj3xa26t3m7p5us8f2y2sd8v6cnsvq465zjx
+ENV ORLY_ADMINS=npub1v30tsz9vw6ylpz63g0a702nj3xa26t3m7p5us8f2y2sd8v6cnsvq465zjx,npub1m4ny6hjqzepn4rxknuq94c2gpqzr29ufkkw7ttcxyak7v43n6vvsajc2jl,npub1l5sga6xg72phsz5422ykujprejwud075ggrr3z2hwyrfgr7eylqstegx9z
+
+# Health check to ensure relay is responding
+HEALTHCHECK --interval=30s --timeout=10s --start-period=5s --retries=3 \
+  CMD sh -c "code=\$(curl -s -o /dev/null -w '%{http_code}' http://127.0.0.1:7777 || echo 000); echo \$code | grep -E '^(101|200|400|404|426)$' >/dev/null || exit 1"
+
+# Create volume for persistent data
+VOLUME ["/data"]
+
+# Drop privileges and run as stella user
+USER 1000:1000
+
+# Run Stella's Nostr relay
+CMD ["/app/relay"]