Add dev container config

.devcontainer/Dockerfile

@@ -0,0 +1,30 @@
+FROM golang:tip-alpine3.22
+
+ARG PROJECT_NAME=learn
+ARG USERNAME=vscode
+ARG USER_ID=1000
+ARG USER_GID=${USER_ID}
+
+
+RUN apk update --no-cache && apk add --no-cache \
+    git \
+    curl \
+    wget \
+    unzip \
+    zsh \
+    && rm -rf /var/lib/apt/lists/* \
+    && go install github.com/go-delve/delve/cmd/dlv@latest \
+    && go install -v golang.org/x/tools/gopls@latest \
+    && addgroup -g ${USER_GID} ${USERNAME} \
+    && adduser -D -u ${USER_ID} \
+       -G ${USERNAME} \
+       -s /bin/zsh \
+       ${USERNAME} \
+    && mkdir -p /home/$USERNAME/.vscode-server \
+    && chown -R ${USER_ID}:${USER_ID} /home/${USERNAME}
+
+USER ${USERNAME}
+WORKDIR /srv/${PROJECT_NAME}
+
+RUN sh -c "$(curl -fsSL https://raw.githubusercontent.com/ohmyzsh/ohmyzsh/master/tools/install.sh)"
+