diff --git a/.dockerignore b/.dockerignore
new file mode 100644
index 0000000000..1822aefdae
--- /dev/null
+++ b/.dockerignore
@@ -0,0 +1,2 @@
+Dockerfile
+.github
diff --git a/.env.sample b/.env.sample
new file mode 100644
index 0000000000..aa68918b19
--- /dev/null
+++ b/.env.sample
@@ -0,0 +1,2 @@
+CUSTOM_API_KEY=""
+REDDIT_USER=""
diff --git a/.gitignore b/.gitignore
index 769def11cb..a1a1e15196 100644
--- a/.gitignore
+++ b/.gitignore
@@ -114,3 +114,5 @@ fabric.properties
 !/gradle/wrapper/gradle-wrapper.jar
 
 # End of https://www.gitignore.io/api/androidstudio
+
+.env
diff --git a/Dockerfile b/Dockerfile
new file mode 100644
index 0000000000..c4af647a87
--- /dev/null
+++ b/Dockerfile
@@ -0,0 +1,20 @@
+FROM ubuntu:latest
+
+RUN apt update && apt upgrade -y
+RUN apt install -y openjdk-11-jdk wget unzip
+RUN wget --quiet --output-document=android-sdk.zip https://dl.google.com/android/repository/commandlinetools-linux-7583922_latest.zip
+RUN unzip -q android-sdk.zip -d /tmp/android-sdk
+
+ENV ANDROID_SDK_ROOT="/tmp/android-sdk"
+ENV JAVA_HOME="/usr/lib/jvm/java-11-openjdk-amd64"
+ENV PATH="${PATH}:/tmp/android-sdk/tools/bin:/tmp/android-sdk/platform-tools"
+
+RUN yes | /tmp/android-sdk/cmdline-tools/bin/sdkmanager  --sdk_root=$ANDROID_SDK_ROOT "platforms;android-30" "build-tools;30.0.3"
+
+ENV CUSTOM_API_KEY=""
+ENV REDDIT_USER=""
+
+COPY . /content
+WORKDIR /content
+
+ENTRYPOINT [ "scripts/start-compilation.sh" ]
diff --git a/README.md b/README.md
index 62d5a9d199..90c548f1da 100644
--- a/README.md
+++ b/README.md
@@ -78,6 +78,7 @@ Bitcoin: bc1qxtkd5ap9na7uy8nr9qpt6jny6tdwaj4v43ddle
     - [Variables reference](#variables-reference)
 - [Roadmap](#roadmap)
 - [Contributing](#contributing)
+- [Build Instructions](#build-instructions)
 - [Support](#support)
 - [License](#license)
 - [Acknowledgements](#acknowledgements)
@@ -167,6 +168,12 @@ Here are other ways you can help:
 
 <p align="right">(<a href="#top">back to top</a>)</p>
 
+## Build Instructions
+
+There's a dedicated Docker-based build approach, which also allows to use a custom API key & User Agent. To run it, make sure you have Docker installed and set up in your machine, then copy the `.env.sample` to `.env` to change the API key & User Agent if you want. Then run `./build.sh`.
+
+After the shell script finishes the build, you'll find the `Infinity.apk` file on the root of this directory.
+
 ## License
 
 Distributed under the AGPL-3.0 License. See <a href="https://github.com/Docile-Alligator/Infinity-For-Reddit/blob/master/LICENSE">LICENSE</a> for more information.
diff --git a/build.sh b/build.sh
new file mode 100755
index 0000000000..ce20a30557
--- /dev/null
+++ b/build.sh
@@ -0,0 +1,10 @@
+#!/bin/bash
+
+CONTAINER_NAME="infinity-builder"
+
+source .env || true
+
+docker build -t infinity-builder .
+docker run -it -e CUSTOM_API_KEY=$CUSTOM_API_KEY -e REDDIT_USER=$REDDIT_USER --name $CONTAINER_NAME infinity-builder /bin/bash
+docker cp $CONTAINER_NAME:/content/app/build/outputs/apk/release/app-release.apk ./Infinity.apk
+docker rm $CONTAINER_NAME
diff --git a/scripts/fix-api-key.sh b/scripts/fix-api-key.sh
new file mode 100755
index 0000000000..16b61ab062
--- /dev/null
+++ b/scripts/fix-api-key.sh
@@ -0,0 +1,15 @@
+#!/bin/bash
+
+echo "Custom API key: $CUSTOM_API_KEY"
+echo "Custom UA: $REDDIT_USER"
+
+if [ -z "$CUSTOM_API_KEY" ]
+then
+  echo "No custom API key, just building..."
+else
+  echo "Custom API key detected, setting it up along the custom UA..."
+
+  sed -i "s/NOe2iKrPPzwscA/$CUSTOM_API_KEY/" app/src/main/java/ml/docilealligator/infinityforreddit/utils/APIUtils.java
+  sed -i "s|infinity://localhost|http://127.0.0.1|" app/src/main/java/ml/docilealligator/infinityforreddit/utils/APIUtils.java
+  sed -iE "s/public static final String USER_AGENT = \"(.*)\";/public static final String USER_AGENT = \"android:personal-app:0.0.1 (by \/u\/$REDDIT_USER)\";/" app/src/main/java/ml/docilealligator/infinityforreddit/utils/APIUtils.java
+fi
diff --git a/scripts/setup-keystore.py b/scripts/setup-keystore.py
new file mode 100755
index 0000000000..761996fbe2
--- /dev/null
+++ b/scripts/setup-keystore.py
@@ -0,0 +1,22 @@
+#!/usr/bin/python3
+
+print("Setting up keystore file...")
+
+build_gradle_file = "./app/build.gradle"
+build_gradle_code = open(build_gradle_file, "r", encoding="utf-8-sig").read()
+build_gradle_code = build_gradle_code.replace(r"""    buildTypes {""", r"""    signingConfigs {
+        release {
+            storeFile file("/content/Infinity.jks")
+            storePassword "Infinity"
+            keyAlias "Infinity"
+            keyPassword "Infinity"
+        }
+    }
+    buildTypes {""")
+build_gradle_code = build_gradle_code.replace(r"""    buildTypes {
+        release {""", r"""    buildTypes {
+        release {
+            signingConfig signingConfigs.release""")
+
+with open(build_gradle_file, "w", encoding="utf-8") as f:
+  f.write(build_gradle_code)
diff --git a/scripts/start-compilation.sh b/scripts/start-compilation.sh
new file mode 100755
index 0000000000..fe62d8f094
--- /dev/null
+++ b/scripts/start-compilation.sh
@@ -0,0 +1,11 @@
+#!/bin/bash
+
+echo "Infinity for Reddit Docker Builder"
+
+./scripts/fix-api-key.sh
+
+wget https://github.com/TanukiAI/Infinity-keystore/raw/main/Infinity.jks
+
+python3 ./scripts/setup-keystore.py
+
+./gradlew assembleRelease