add build description

README.md

@@ -110,4 +110,20 @@ http://ftp.hk.debian.org/debian/pool/main/s/squashfs-tools-ng/libsquashfs1_1.2.0
 ```shell
 sudo dpkg -i ./libsquashfs1_1.2.0-1_amd64.deb 
 sudo dpkg -i ./squashfs-tools-ng_1.2.0-1_amd64.deb 
+```
+
+## apptainer build 
+
+构建前需要设置一块较大的临时目录，并赋予相关权限
+
+```shell
+export SINGULARITY_TMPDIR=/media/lingyuzeng/6567754c-15a4-4b60-9689-c8156da94524/tmp
+mkdir -p /media/lingyuzeng/6567754c-15a4-4b60-9689-c8156da94524/tmp
+sudo chown -R user:user /media/lingyuzeng/6567754c-15a4-4b60-9689-c8156da94524/tmp
+```
+
+构建镜像
+
+```shell
+singularity build --fakeroot ./singularity/tcrmodel2.sif ./singularity/tcrmodel2_singularity.def
 ```