Add devcontainer configuration and initialization scripts

.devcontainer/Dockerfile

@@ -0,0 +1,9 @@
+FROM mcr.microsoft.com/devcontainers/java:1-21-bullseye
+
+ENV MAVEN_CONFIG=/var/maven/.m2
+
+# [Optional] Uncomment if you want to install more tools
+RUN apt-get update && export DEBIAN_FRONTEND=noninteractive \
+    && apt-get -y install --no-install-recommends maven \
+    && mkdir -p /var/maven/.m2 \
+    && chown -R vscode:vscode /var/maven/.m2

.devcontainer/commands/initialize.sh

@@ -0,0 +1,5 @@
+#!/bin/bash
+set -e
+
+git config --local user.name "$(git config user.name)"
+git config --local user.email "$(git config user.email)"

.devcontainer/devcontainer.json

@@ -0,0 +1,35 @@
+// For format details, see https://aka.ms/devcontainer.json. For config options, see the
+// README at: https://github.com/devcontainers/templates/tree/main/src/java
+{
+    "name": "YDB Java SDK",
+    "dockerFile": "Dockerfile",
+    // Allows the container to use ptrace, which is useful for debugging.
+    "capAdd": [
+        "SYS_PTRACE"
+    ],
+    // Disables seccomp, which can be necessary for some debugging tools to function correctly.
+    "securityOpt": [
+        "seccomp=unconfined"
+    ],
+    "features": {
+        "ghcr.io/devcontainers/features/github-cli:1": {},
+        "ghcr.io/devcontainers/features/docker-outside-of-docker:1": {}
+    },
+    // Use 'initializeCommand' to run commands before the container is created.
+    "initializeCommand": "chmod +x .devcontainer/commands/initialize.sh && .devcontainer/commands/initialize.sh",
+    // Use 'postCreateCommand' to run commands after the container is created.
+    // Use 'postStartCommand' to run commands after the container is started.
+    // Configure tool-specific properties.
+    "customizations": {
+        "vscode": {
+            "extensions": [
+                "redhat.java",
+                "vscjava.vscode-java-pack"
+            ]
+        }
+    },
+    // Maven cache volume configuration.
+    "mounts": [
+        "source=maven-cache,target=/var/maven/.m2,type=volume"
+    ]
+}

.github/dependabot.yml

@@ -0,0 +1,12 @@
+# To get started with Dependabot version updates, you'll need to specify which
+# package ecosystems to update and where the package manifests are located.
+# Please see the documentation for more information:
+# https://docs.github.com/github/administering-a-repository/configuration-options-for-dependency-updates
+# https://containers.dev/guide/dependabot
+
+version: 2
+updates:
+ - package-ecosystem: "devcontainers"
+   directory: "/"
+   schedule:
+     interval: weekly

.gitignore

@@ -9,4 +9,7 @@
 **/.idea/
 **/*.iml
 **/*.iws
-**/*.ipr
+**/*.ipr
+
+# VS Code
+.vscode