Added Dockerfile and .gitignore

.gitignore

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+.idea/

Dockerfile

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+FROM jenkins/jenkins
+
+USER root
+RUN groupadd -g 281 docker
+RUN usermod -aG docker jenkins
+
+RUN apt-get update
+RUN apt-get install -y\
+        ca-certificates \
+        curl \
+        gnupg \
+
+RUN mkdir -m 0755 -p /etc/apt/keyrings
+RUN curl -fsSL https://download.docker.com/linux/debian/gpg | gpg --dearmor -o /etc/apt/keyrings/docker.gpg
+
+RUN echo \
+      "deb [arch="$(dpkg --print-architecture)" signed-by=/etc/apt/keyrings/docker.gpg] https://download.docker.com/linux/debian \
+      "$(. /etc/os-release && echo "$VERSION_CODENAME")" stable" | \
+      tee /etc/apt/sources.list.d/docker.list > /dev/null \
+
+RUN apt-get update
+RUN apt-get install -y docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin
+
+USER jenkins