diff --git a/.DS_Store b/.DS_Store
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index 0000000..5008ddf
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diff --git a/README.md b/README.md
deleted file mode 100644
index 640bee2..0000000
--- a/README.md
+++ /dev/null
@@ -1 +0,0 @@
-# docker-sandbox
\ No newline at end of file
diff --git a/day3/prac2/docker-compose.yml b/day3/prac2/docker-compose.yml
index d55059f..60a69ec 100644
--- a/day3/prac2/docker-compose.yml
+++ b/day3/prac2/docker-compose.yml
@@ -1 +1,27 @@
-# 코드를 추가해주세요
+name: compose-test
+services:
+  webapp:
+    image: python:3.13-slim
+    container_name: flask-app
+    ports:
+      - "8080:5000"
+    volumes:
+      - ./app:/app
+    working_dir: /app
+    command: sh -c "pip install --no-cache-dir flask redis && python app.py"
+    depends_on:
+      redis:
+        condition: service_healthy
+
+  redis:
+    image: redis:7.0
+    container_name: redis-db
+    ports:
+      - "6379:6379"
+    volumes:
+      - ./data:/data
+    healthcheck:
+      test: [ 'CMD', 'redis-cli', 'ping' ]
+      interval: 5s
+      timeout: 3s
+      retries: 3
\ No newline at end of file
diff --git a/day4/prac1/.DS_Store b/day4/prac1/.DS_Store
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index 0000000..5008ddf
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diff --git a/day4/prac1/Dockerfile b/day4/prac1/Dockerfile
new file mode 100644
index 0000000..d3bf6f2
--- /dev/null
+++ b/day4/prac1/Dockerfile
@@ -0,0 +1,20 @@
+<<<<<<< HEAD
+FROM golang:1.24
+WORKDIR /src
+COPY ./main.go .
+RUN go build -o /bin/hello ./main.go
+CMD ["/bin/hello"]
+=======
+FROM golang:1.24 AS builder
+WORKDIR /src
+COPY ./main.go .
+ARG TARGETOS=linux
+ARG TARGETARCH=amd64
+ENV CGO_ENABLED=0
+RUN GOOS=${TARGETOS} GOARCH=${TARGETARCH} \
+    go build -ldflags="-s -w" -o hello main.go
+
+FROM scratch
+COPY --from=builder /src/hello /hello
+ENTRYPOINT ["/hello"]
+>>>>>>> 77187a3 (single multi compare - 권지은)
diff --git a/day4/prac1/Dockerfile.single b/day4/prac1/Dockerfile.single
new file mode 100644
index 0000000..895c83e
--- /dev/null
+++ b/day4/prac1/Dockerfile.single
@@ -0,0 +1,5 @@
+FROM golang:1.24
+WORKDIR /src
+COPY ./main.go .
+RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -o /bin/hello ./main.go
+CMD ["/bin/hello"]
diff --git a/day4/prac1/main.go b/day4/prac1/main.go
new file mode 100644
index 0000000..b7d2a32
--- /dev/null
+++ b/day4/prac1/main.go
@@ -0,0 +1,7 @@
+package main
+
+import "fmt"
+
+func main() {
+    fmt.Println("Hello, World!")
+}
diff --git a/day4/screenshot/compare 1.png b/day4/screenshot/compare 1.png
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diff --git a/day4/screenshot/result 1.png b/day4/screenshot/result 1.png
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diff --git a/day4/screenshot/single 1.png b/day4/screenshot/single 1.png
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