Fix build (AppImage#98)

* Remove -fPIE

* FROM ${docker_arch}/alpine:3.20

Author: probonopd

scripts/docker/Dockerfile

@@ -1,5 +1,5 @@
 ARG docker_arch
-FROM ${docker_arch}/alpine:latest
+FROM ${docker_arch}/alpine:3.20
 
 # includes dependencies from https://git.alpinelinux.org/aports/tree/main/fuse3/APKBUILD
 RUN apk add --no-cache \

src/runtime/Makefile

@@ -1,5 +1,5 @@
 CC            = gcc
-CFLAGS        = -std=gnu99 -Os -D_FILE_OFFSET_BITS=64 -DGIT_COMMIT=\"${GIT_COMMIT}\" -T data_sections.ld -ffunction-sections -fdata-sections -Wl,--gc-sections -static -Wall -Werror -fPIE
+CFLAGS        = -std=gnu99 -Os -D_FILE_OFFSET_BITS=64 -DGIT_COMMIT=\"${GIT_COMMIT}\" -T data_sections.ld -ffunction-sections -fdata-sections -Wl,--gc-sections -static -Wall -Werror
 LIBS          = -lsquashfuse -lsquashfuse_ll -lzstd -lz -lfuse3
 
 all: runtime